Compression fuel tank

Abstract

The present invention provides a compression type fuel tank, which includes: an inner tank, which stores liquefied gas; a support rod, which passes through the central axis of the inner tank, and the two sides of the inner tank are fixed to the two end portions of the support rod; an insulating component, which is arranged in a manner of wrapping the inner tank to block heat transfer with the outside; an outer tank, which accommodates the inner tank, the support rod and the insulation component therein; and a rod support portion, which is fixed to the inner sides of the outer tank and supports the two end portions of the support rod, so that the load of the inner tank is transferred to the two side surfaces of the outer tank.

Description

Technical Field

[0001] The present invention relates to a compression type fuel tank, and more particularly, to a compression type fuel tank capable of effectively storing extremely low temperature liquefied gas such as liquefied hydrogen or liquefied natural gas. Background Art

[0002] In recent years, environmental pollution caused by the use of fossil fuels has become increasingly serious, especially the air pollution problem caused by automobile exhaust has become increasingly serious.

[0003] In view of this, the development and popularization of vehicles using natural gas, electric vehicles and vehicles using hydrogen fuel are gradually increasing.

[0004] Among them, hydrogen fuel is not only the most abundant element on the earth after carbon and nitrogen, but also a clean energy source. It produces only a very small amount of nitrogen oxides when burned and does not emit any other pollutants. It is an optimal energy source that can be produced using the almost unlimited amount of water on the earth as raw material, and since it is recycled as water after use, there is almost no worry about depletion.

[0005] Generally speaking, hydrogen cars use electricity generated by the electrochemical reaction of hydrogen supplied from high-pressure hydrogen tanks with oxygen in the air in a fuel cell stack to drive the car.

[0006] Among them, a general hydrogen fuel tank applied to a hydrogen vehicle stores hydrogen compressed at a high pressure of 350 bar to 900 bar so as to store a large amount of hydrogen, and for this purpose, is manufactured using expensive composite materials.

[0007] For hydrogen fuel tanks used in vehicles, it is very important to safely store a large amount of hydrogen in a small size in order to ensure passenger space and sufficient driving range.

[0008] However, in the case of existing hydrogen fuel tanks, since they store high-pressure compressed hydrogen, cracks may occur due to increased internal pressure or impact applied from the outside. When this causes hydrogen leakage, explosions may occur, thus posing a problem of threatening vehicle safety. Summary of the Invention

[0009] Technical problems to be solved

[0010] An object of the present invention is to provide a compression type fuel tank, specifically, to provide a compression type fuel tank capable of safely and easily storing cryogenic liquefied hydrogen so as to be able to reduce the size of the fuel tank while increasing the hydrogen storage amount.

[0011] The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and those skilled in the art will be able to clearly understand other technical problems not mentioned from the following description.

[0012] Solutions to the Problem

[0013] In order to solve the problems shown above, the present invention provides a compression type fuel tank, which includes: an inner tank, which stores liquefied gas; a support rod, which passes through the central axis of the inner tank, and the two sides of the inner tank are fixed to the two ends of the support rod; an insulating component, which is arranged to wrap the inner tank to block heat transfer with the outside; an outer tank, which accommodates the inner tank, the support rod and the insulation component inside; and a rod support part, which is fixed to the inner sides of the outer tank and supports the two ends of the support rod, so that the load of the inner tank is transferred to the two side surfaces of the outer tank.

[0014] In addition, a compression type fuel tank is provided, wherein the rod support part is in the shape of a plate and is integrally fixed to both inner side surfaces of the outer tank so that the inner tank is arranged in the middle, and coupling holes for coupling both ends of the support rod are formed on the plate surface.

[0015] Furthermore, there is provided a compression type fuel tank in which an inner tank is formed by connecting a plurality of modular tank bodies storing liquefied gas in such a manner as to communicate with each other.

[0016] Furthermore, a compression type fuel tank is provided in which a modular tank body is formed in a spherical or toroidal shape so as to be able to uniformly disperse stress acting on the inside.

[0017] In addition, a compression-type fuel tank is provided, in which a plurality of modular tank bodies are formed in a manner of being connected to each other by being joined to each other only partially so as to be able to expand or contract with each other according to temperature changes, and in which the modular tank bodies arranged at both side edges are fixed to support rods so as to prevent the plurality of modular tank bodies from expanding or contracting beyond a predetermined range.

[0018] Furthermore, a compression-type fuel tank is provided, wherein a plurality of modular tank bodies are formed with communication holes at mutually connected portions, and an annular reinforcement member is provided around the communication holes.

[0019] In addition, a compression-type fuel tank is provided, wherein a support rod is arranged in a manner that passes through a connecting hole formed in a plurality of modular tank bodies, and an outer peripheral surface of the support rod and a reinforcement member around the connecting hole are arranged at a predetermined interval, thereby forming a space for the flow of liquefied gas between the outer peripheral surface of the support rod and the connecting hole.

[0020] Furthermore, a compression-type fuel tank is provided, wherein the communication hole includes a support portion that supports the outer peripheral surface of the support rod to prevent the support rod from sagging.

[0021] Furthermore, a compression type fuel tank is provided, wherein the inner tank is made of one of stainless steel, invar, nickel steel, high manganese steel, and aluminum.

[0022] In addition, a compression-type fuel tank is provided, wherein the insulation component includes: a first insulation member, which is formed into a cylindrical shape by spraying a polymer foam onto the curved outer side surface of the inner tank; a second insulation member, which wraps the first insulation member; and a third insulation member, which is formed into a tubular shape and coupled to the outer side surface of the second insulation member.

[0023] In addition, a compression-type fuel tank is provided, wherein a first insulation member is formed of spray-coated polyurethane foam, a second insulation member is formed of at least one of a composite insulation member of stacked layers of aluminum films and gaskets, aerogel, or glass wool, and a third insulation member is formed of polyurethane foam processed into a tubular shape.

[0024] Furthermore, a compression type fuel tank is provided in which a heat insulating member is formed of a composite heat insulating member in which a plurality of layers of aluminum films and gaskets are stacked to wrap an inner tank.

[0025] Effects of the Invention

[0026] The compression-type fuel tank according to an embodiment of the present invention is equipped with multiple layers of insulation components to wrap an inner tank for storing liquefied hydrogen, and can be housed in an outer tank that functions as a vacuum jacket to provide improved insulation performance. In addition, it can safely and easily store extremely low-temperature liquefied hydrogen and can store hydrogen at a high density to increase the hydrogen storage capacity.

[0027] In addition, support rods are protruding on both sides of the inner tank for storing liquefied hydrogen, and rod support parts for supporting the support rods are integrally provided on both sides of the interior of the outer tank that accommodates the inner tank. The outer tank is constructed in such a way that the load of the inner tank is transferred to the side surfaces of the outer tank through the support rods and the rod support parts, thereby preventing the load of the inner tank from being transferred to the insulation component and causing deformation, thereby ensuring insulation performance and increasing structural safety.

[0028] Furthermore, by forming the internal tank by connecting a plurality of modular tank bodies in a manner communicating with each other, the internal tank can be manufactured by increasing or decreasing the number of modular tank bodies by matching the storage capacity of liquefied hydrogen.

[0029] In addition, by forming the modular tank body into a spherical or annular shape, the internal expansion pressure acts evenly on the inner surface of the circular tank body, thereby suppressing the stress concentration in a certain part of the tank body and evenly dispersing the stress, thereby improving the structural safety of the tank body.

[0030] In addition, by being constructed in a manner capable of storing extremely low-temperature liquefied hydrogen, hydrogen can be stored at a high density, so the volume and weight can be greatly reduced compared to existing hydrogen fuel tanks with the same capacity, thus having the advantage of being easy to install on a vehicle.

[0031] Effects obtainable by the present invention are not limited to the above-mentioned effects, and those skilled in the art will be able to clearly understand other effects not mentioned from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A cross-sectional view of the structure of a compression type fuel tank according to an embodiment of the present invention is shown.

[0033] Figure 2 An inner tank according to an embodiment of the present invention is shown.

[0034] Figure 3 The internal structure of the inner tank according to one embodiment of the present invention is shown.

[0035] Figure 4 The figure shows a combined structure of a rod support portion and a supporting rod according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

[0037] The detailed description disclosed below in conjunction with the accompanying drawings is intended to illustrate exemplary embodiments of the present invention, but is not intended to represent the only embodiments in which the present invention can be implemented.

[0038] In order to clearly illustrate the present invention, parts not related to the description may be omitted in the drawings, and the same reference numerals may be used for the same or similar components throughout the specification.

[0039] In the embodiments of the present invention, expressions such as “or”, “at least one”, etc. may represent one of the listed words, or a combination of two or more.

[0040] Figure 1 FIG. 1 shows a cross-sectional view of a compression fuel tank 100 according to an embodiment of the present invention. Figure 2 An inner tank 110 according to an embodiment of the present invention is shown. Figure 3 The inner structure of the inner tank 110 according to an embodiment of the present invention is shown.

[0041] The compression type fuel tank 100 according to the present invention can store cryogenic liquefied gas such as liquefied hydrogen or liquefied natural gas. In the following embodiment, a fuel tank for storing hydrogen fuel used in a hydrogen fuel vehicle will be described as a representative example.

[0042] Reference Figures 1 to 3 The compression type fuel tank 100 according to an embodiment of the present invention may include an inner tank 110 , a support rod 120 , an insulating member 130 , an outer tank 140 , and a rod support portion 150 .

[0043] The internal tank 110 may be formed in a shape in which a plurality of modular tank bodies 111 storing liquefied gas are connected in a communicable manner with each other.

[0044] Among them, each modular tank body 111 can be formed of a metal material that can store extremely low-temperature liquefied hydrogen, for example, it can be formed of metal materials such as stainless steel, invar, nickel steel, high manganese steel or aluminum. The higher the strength of the material, the more mold technology can be used to manufacture the modular tank body 111 with thin plates.

[0045] The modular tank body 111 may be formed in a spherical or annular shape, with a storage space for storing liquefied hydrogen formed therein, and a connecting hole 112 may be formed in the center of a side portion connected to another modular tank body 111 .

[0046] At this time, since the modular tank body 111 of this embodiment is formed into a spherical or annular shape, the internal expansion pressure acts evenly on the inner surface of the circular tank body, thereby suppressing the stress concentration in a certain part of the tank body and evenly dispersing the stress, thereby improving the structural safety of the tank body.

[0047] In addition, the modular tank body 111 can be connected to another modular tank body 111 by welding. By making the connecting hole 112 of the modular tank body 111 close to the connecting hole 112 of another modular tank body 111 and welding the peripheral parts of the connecting holes 112 that are close to each other, the centers of the facing side parts of the modular tank bodies 111 can be connected to each other, and multiple modular tank bodies 111 can be connected in this way to form an internal tank 110.

[0048] At this time, by setting an annular reinforcement 113 corresponding to the connecting hole 112 and welding the reinforcement 113 to the surrounding of the connecting hole 112 of the modular tank bodies 111 that are pressed against each other, the modular tank bodies 111 can be firmly joined through the reinforcement 113, and the connecting hole 112 can be prevented from being deformed.

[0049] In the internal tank 110 formed as described above, the liquefied hydrogen stored in the plurality of modular tank bodies 111 may flow between the modular tank bodies 111 through the communication holes 112 .

[0050] As an example, this embodiment shows an example of connecting nine modular tank bodies 111 in one direction so that they are connected to each other to form the internal tank 110, but the internal tank 110 can be formed by increasing or decreasing the number of modular tank bodies 111 by matching the storage capacity of the stored liquefied hydrogen.

[0051] The support rod 120 passes through the central axis of the inner tank 110 , and both sides of the inner tank 110 may be fixed to both ends of the support rod 120 .

[0052] Specifically, the support rod 120 is formed in a bar shape and passes through the plurality of modular tank bodies 111 constituting the inner tank 110 . The modular tank bodies 111 disposed on both sides of the inner tank 110 can be fixed to both ends of the rod, respectively.

[0053] That is, the support rod 120 is formed with a diameter smaller than the connecting hole 112 of the modular tank body 111, so that it can be configured to pass through the connecting holes 112 respectively formed in multiple modular tank bodies 111, one end of the rod can be engaged with the outer side surface of the modular tank body 111 configured on one side of the internal tank 110, and the other end of the rod can be engaged with the outer side surface of the modular tank body 111 configured on the other side of the internal tank 110 and fixed.

[0054] At this time, the portions where the modular tank bodies 111 disposed on both sides of the inner tank 110 are joined to the support rods 120 are rounded toward the inside of the tank body, thereby suppressing stress concentration on the joints with the support rods 120 .

[0055] As described above, the support rod 120 is arranged to pass through the inner tank 110. By simply joining the two ends of the rod to the two side surfaces of the inner tank 110 for fixing, the inner tank 110 can be prevented from expanding or contracting beyond a predetermined range in the longitudinal direction.

[0056] Specifically, in the case of the inner tank 110 according to this embodiment, since the plurality of modular tank bodies 111 are connected to each other by only partially welding the periphery of the communication hole 112, they can expand or contract with each other according to temperature changes, thereby preventing damage caused by thermal deformation applied to the tank bodies. When the expansion or contraction range increases, it may affect the heat insulating member 130 or the outer tank 140 surrounding the inner tank 110. Therefore, the modular tank bodies 111 arranged at the edge of the plurality of modular tank bodies 111 can be fixed by support rods 120 to prevent the plurality of modular tank bodies 111 from expanding or contracting beyond a predetermined range.

[0057] In addition, both end portions of the support rod 120 may protrude from both side surfaces of the inner tank 110 and be coupled to a rod support portion 150 to be described later.

[0058] In addition, in this embodiment, the support rod 120 of the connecting hole 112 passing through the internal tank 110 maintains a predetermined interval with the reinforcement 113 around the connecting hole 112, thereby forming a connecting hole space between the support rod and the reinforcement. However, when the tank body is enlarged, a support portion supporting the outer peripheral surface of the support rod can be provided in a part of the connecting hole space between the reinforcement and the support member to prevent the support rod from sagging.

[0059] The heat insulating member 130 is formed of multiple layers of heat insulating materials and is provided in a manner of wrapping the inner tank, thereby blocking heat transfer with the outside.

[0060] Specifically, the insulation component 130 may include: a first insulation component 131, which is formed by spraying onto the inner tank 110; a second insulation component 132, which wraps the first insulation component 131; and a third insulation component 133, which is formed of a hard insulation material and is bonded to the outer side of the second insulation component 132.

[0061] The first heat insulating member 131 is formed by spraying a polymer foam such as polyurethane foam onto the inner tank 110 in a spraying manner, thereby being foam-molded so as to tightly wrap the inner tank 110 .

[0062] At this time, since the outer side surface of the inner tank 110 formed by joining the plurality of modular tank bodies 111 is curved, the inner tank 110 may be molded into a cylindrical appearance as a whole by spraying polymer foam onto the curved outer side surface.

[0063] In addition, the second thermal insulation member 132 can be formed by a composite insulating material of stacked multiple layers of aluminum film and gaskets, multiple layers of aerogel or multiple layers of glass wool, or a combination thereof, and this second thermal insulation member can be arranged in a manner of wrapping the first thermal insulation member 131 formed into a cylindrical shape.

[0064] The composite thermal insulation member is manufactured by laminating approximately 6 to 20 layers of aluminum films and spacers with an air layer, thereby providing excellent thermal insulation performance in a vacuum environment between the inner tank 110 and the outer tank 140 .

[0065] In addition, the third heat insulating member 133 is a hard polymer foam processed into a tubular shape, and polyurethane foam having heat insulating and cushioning properties may be used, and may be bonded to the outer side surface of the second heat insulating member 132 formed into a cylindrical shape.

[0066] At this time, the third heat insulating member 133 formed in a tubular shape may function as a cover that wraps the outer peripheral surface of the second heat insulating member 132 formed in a cylindrical shape.

[0067] On the other hand, in the above embodiment, although the heat insulating member 130 is composed of the first heat insulating member 131 , the second heat insulating member 132 and the third heat insulating member 133 , the heat insulating member 130 may be composed of only the second heat insulating member 132 .

[0068] As an example, in order to improve the insulation performance, the space between the inner tank 110 and the outer tank 140 is formed into a high vacuum state. When using insulating members formed of foam such as the first insulating member 131 and the third insulating member 133, it may take a lot of time to form a high vacuum state. Therefore, only the second insulating member 132 can be used to easily form a high vacuum state as needed.

[0069] The outer tank 140 may be formed so as to house the inner tank 110 , the support rod 120 , and the heat insulating member 130 therein.

[0070] The outer tank 140 may be formed of a metal material such as stainless steel or aluminum, and may wrap and protect the inner tank 110 , the support rod 120 and the insulation member 130 .

[0071] Furthermore, the outer can 140 can seal the interior of the inner can 110 , the support rod 120 , and the heat insulating member 130 in a high vacuum state, thereby improving the heat insulating performance.

[0072] On the one hand, the rod support portion 150 may be fixed to both sides of the inner portion of the outer tank 140 to support both ends of the support rod 120 .

[0073] Figure 4 FIG. 1 shows a combined structure of a rod support portion 150 and a support rod 120 according to an embodiment of the present invention.

[0074] Reference Figure 1 and Figure 4 The rod support portion 150 may be formed of plywood or the like and fixed to both inner side surfaces of the outer tank 140 .

[0075] Specifically, the rod support part 150 is formed in a disc shape corresponding to the side surface of the outer can 140 , and thus may be integrally coupled to the inner side surface of the outer can 140 .

[0076] As an example, studs may be formed on the inner side of the outer can 140 , and the rod support portion 150 may be integrally coupled to the inner side of the outer can 140 through the studs.

[0077] In addition, a coupling hole 151 to which a distal end of the support rod 120 protruding from the inner can 110 is coupled may be formed at the center of the rod support portion 150 .

[0078] As described above, the rod support parts 150 are integrally coupled to the two inner side surfaces of the outer tank 140, so that the inner tank 110 can be arranged between a pair of rod support parts 150, and the two side ends of the support rod 120 protruding from both sides of the inner tank 110 can be coupled to the coupling holes 151 of the opposing rod support parts 150.

[0079] Thus, the load of the inner tank 110 can be transferred to the side surfaces of the outer tank 140 through the support rod 120 and the rod support portion 150, thereby preventing the load of the inner tank 110 from being applied to the insulation component 130 and causing deformation. By this, the formation of a heat transfer path (heat path) in the insulation component 130 is suppressed, thereby ensuring the insulation performance and increasing the structural safety.

[0080] Compared to existing hydrogen fuel tanks that use expensive composite materials to withstand the high pressure brought about by compressing and storing hydrogen at high pressure, the compression-type fuel tank 100 according to this embodiment can be simply manufactured using relatively inexpensive materials and can easily store ultra-low temperature liquefied hydrogen, thereby having the advantages of increasing the hydrogen storage capacity and reducing the manufacturing cost of the fuel tank.

[0081] In particular, in the case of the compression-type fuel tank 100 of this embodiment, by being constructed in a manner capable of storing extremely low-temperature liquefied hydrogen, compared to existing hydrogen fuel tanks that compress and store hydrogen at high pressure, it is possible to maintain a relatively low pressure and store hydrogen at a high density, thereby increasing the hydrogen storage capacity.

[0082] In addition, since hydrogen can be stored at a high density, the volume and weight can be greatly reduced compared to existing hydrogen fuel tanks with the same capacity, which has the advantage of being easy to install on vehicles.

[0083] As an example, when the compression type fuel tank 100 of this embodiment is formed into a cylindrical tank body with a diameter of 650 mm to 660 mm and a length of 2500 mm to 2700 mm, it can accommodate approximately 40 kg to 50 kg of liquefied hydrogen.

[0084] In addition, the inner tank 110 can be easily protected by the outer tank 140 and the multi-layer insulation member. Even if an accident occurs in which the inner tank 110 ruptures due to external impact or internal pressure, the multi-layer insulation member can also play a buffering role, thereby achieving safety within the vehicle by minimizing the shock wave emitted from the inner tank 110.

[0085] Furthermore, since the multi-layer insulation also absorbs impact from the outside, the impact transmitted to the inner tank 110 is mitigated, and additional safety from external impacts such as traffic accidents can be achieved compared to existing tanks.

[0086] On the one hand, in the above embodiment, although the compression type fuel tank 100 applied to a vehicle has been described, the present invention is not necessarily limited thereto and can obviously be applied to various transportation vehicles such as ships using liquefied gas.

[0087] As described above, the compression-type fuel tank 100 according to an embodiment of the present invention is provided with a multi-layered insulation member 130 in a manner that wraps the inner tank 110 storing liquefied hydrogen, and can be housed in the outer tank 140 that functions as a vacuum jacket to provide improved insulation performance. In addition, it can safely and easily store extremely low-temperature liquefied hydrogen and can store hydrogen at a high density to increase the hydrogen storage capacity.

[0088] In particular, support rods 120 are protrudingly provided on both sides of the internal tank 110 for storing liquefied hydrogen, and rod support portions for supporting the support rods 120 are integrally provided on both sides of the interior of the external tank 140 that accommodates the internal tank 110. The load of the internal tank 110 is transferred to the side surfaces of the external tank 140 through the support rods 120 and the rod support portions 150, preventing the load of the internal tank 110 from being transferred to the insulation component 130 and causing deformation, thereby ensuring insulation performance and increasing structural safety.

[0089] Furthermore, the internal tank 110 is formed by connecting a plurality of modular tank bodies 111 in a manner of communicating with each other, so that the internal tank 110 can be manufactured by increasing or decreasing the number of modular tank bodies 111 by matching the storage capacity of liquefied hydrogen.

[0090] In addition, by forming the modular tank body 111 into a spherical or annular shape, the internal expansion pressure acts evenly on the inner surface of the circular tank body, thereby suppressing the stress concentration in a certain part of the tank body and evenly dispersing the stress, thereby improving the structural safety of the tank body.

[0091] Furthermore, since the plurality of modular tank bodies 111 are connected in one direction by welding only a portion of their centers, the plurality of modular tank bodies 111 can expand or contract relative to each other in response to temperature changes, thereby preventing damage caused by thermal deformation applied to the tank bodies. Furthermore, by securing both sides of the inner tank 110 to the support rods 120, the plurality of modular tank bodies 111 are prevented from expanding or contracting beyond a predetermined range, thereby preventing any impact on the insulation member 130 or the outer tank 140 surrounding the inner tank 110, thereby improving structural safety.

[0092] The embodiments of the present invention disclosed in this specification and the drawings are merely specific examples provided to facilitate explanation of the technical content of the present invention and to help understanding the present invention, and do not limit the scope of the present invention.

[0093] Therefore, the scope of the present invention should be understood to include not only the embodiments disclosed herein but also all changes or modifications based on the technical concept of the present invention.

Claims

1. A compression fuel tank, wherein: include: an internal tank storing liquefied gas; a support rod, the support rod passing through the central axis of the inner tank, and the two sides of the inner tank are fixed to the two ends of the support rod; a heat insulating member, the heat insulating member being arranged in a manner of wrapping the inner tank to block heat transfer with the outside; an outer tank that accommodates the inner tank, support rods, and thermal insulation members therein; and Rod support parts are fixed to both sides of the inner portion of the outer tank to support both ends of the support rod so that the load of the inner tank is transferred to both sides of the outer tank. The internal tank is formed by connecting a plurality of modular tanks for storing liquefied gas. The plurality of modular tanks are provided with communicating holes at the locations where they are connected to each other. The communicating hole includes a supporting portion that supports an outer peripheral surface of the supporting rod to prevent the supporting rod from sagging.

2. The compression type fuel tank according to claim 1, wherein: The rod support portion is in the shape of a plate and is integrally fixed to both inner side surfaces of the outer tank so that the inner tank is arranged in the middle. A coupling hole for coupling both ends of the support rod is formed on the plate surface.

3. The compression type fuel tank according to claim 1, wherein: The modular tank body is formed in a spherical or toroidal shape so as to evenly disperse the stress acting on the inside.

4. The compression type fuel tank according to claim 1, wherein: A plurality of said modular tanks are formed in a manner of being connected to each other by being joined to each other only partially so as to be able to expand or contract with each other according to temperature changes, Among the plurality of modular tanks, the modular tanks arranged at both side edges are fixed to the support rods so as to prevent the plurality of modular tanks from expanding or contracting beyond a predetermined range.

5. The compression type fuel tank according to claim 1, wherein An annular reinforcement is provided around the communicating hole.

6. The compression type fuel tank according to claim 5, wherein: The support rod is arranged in a manner of passing through the communication holes formed in the plurality of modular tank bodies, and the outer peripheral surface of the support rod is arranged at a predetermined interval from the reinforcement member around the communication hole, thereby forming a space for the flow of liquefied gas between the outer peripheral surface of the support rod and the communication hole.

7. The compression type fuel tank according to claim 1, wherein: The inner tank is made of one of stainless steel, invar, nickel steel, high manganese steel and aluminum.

8. The compression type fuel tank according to claim 1, wherein: The thermal insulation component comprises: a first insulation member formed into a cylindrical shape by spraying a polymer foam onto the curved outer side surface of the inner tank; a second thermal insulation member, the second thermal insulation member wrapping the first thermal insulation member; and The third heat-insulating member is formed into a tubular shape and is coupled to an outer side surface of the second heat-insulating member.

9. The compression type fuel tank according to claim 8, wherein: The first insulation member is formed by spraying polyurethane foam, the second insulation member is formed by at least one of a composite insulation member of stacked multiple layers of aluminum film and gasket, aerogel, or glass wool, and the third insulation member is formed by polyurethane foam processed into a tubular shape.

10. The compression type fuel tank according to claim 1, wherein The thermal insulation member is formed of a composite thermal insulation member formed by laminating multiple layers of aluminum films and gaskets to wrap the inner tank.

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